单项选择题 By the time charter，a Shipowner agrees to place his vessel at the disposal of a Charterer for （）.

单项选择题 Both the Shipowner and the Charterer will be discharged from their obligations under the charter-party if it（）frustrated.

单项选择题 Because most，if not all，of the evidence（）the carrier，the burden of proof soon shifts to the carrier，once the claimant has made initial proof of improper care.